Hi, I have a 1970's (I think) Longines wrist watch in gold which has been back and forth to a local-ish repairer twice (each time costing a fortune) and I would now like to remove the back and see for myself what is going on - I have a suspicion that it is simply dirty since it runs fine for a day or so and then stops, starts, stops again etc etc - but I am no watchmaker so I'm just guessing and curious. I cannot locate a method of removing the back and cannot see any leverage slots for a removal tool.
If anyone has any ideas about how to remove the back of this watch I would be grateful before I start wielding something :-)
I have attached a photo of the watch back.
Many Thanks, Richardwatch_small.jpg